I have had Ilfochrome paper that was much older than one year old, that was never in a freezer throughout that time and where pictures came out just fine. Before you toss out your stash or repurpose it for non-photographic tasks, I'd highly recommend you give it at least a try. Some time back I wrote an article on APUG where you get instructions for amateur use of this material. The biggest requirement is a color enlarger which you seem to have anyway.

I have seen all kinds of film scanned or printed on RA4 (negs) and Ilfochrome (slides), but in my opinion you haven't seen colors until you've seen Kodak E100VS or Fuji Astia optically printed on Ilfochrome material, even with the simple means of a small dark room.

I saw your thread last night on my quest for some info on the subject. Very interesting read!

The only thing stopping me from trying it, if I may say so, is my complete lack of experience on the matter of wet printing.